Pith Number

pith:UMQQYZEM

pith:2013:UMQQYZEMACQZ4YENVB2MRDGIB6

not attested not anchored not stored refs pending

Confinement Stabilizes a Bacterial Suspension into a Spiral Vortex

Francis G. Woodhouse, Hugo Wioland, John O. Kessler, J\"orn Dunkel, Raymond E. Goldstein

arxiv:1304.2875 v1 · 2013-04-10 · cond-mat.soft · physics.bio-ph · q-bio.CB

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UMQQYZEMACQZ4YENVB2MRDGIB6}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T03:17:56.549496Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3210c648c00a19e608da874c88cc80f942ef17b86a0e438a6c3d0cc20a26085

Aliases

arxiv: 1304.2875 · arxiv_version: 1304.2875v1 · doi: 10.48550/arxiv.1304.2875 · pith_short_12: UMQQYZEMACQZ · pith_short_16: UMQQYZEMACQZ4YEN · pith_short_8: UMQQYZEM

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/UMQQYZEMACQZ4YENVB2MRDGIB6 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: a3210c648c00a19e608da874c88cc80f942ef17b86a0e438a6c3d0cc20a26085

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "22b2e169182e79b3af4d100da1fd6936ce4ecf648a1c4862d3b3cb3d96b4e5e2",
    "cross_cats_sorted": [
      "physics.bio-ph",
      "q-bio.CB"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.soft",
    "submitted_at": "2013-04-10T08:31:42Z",
    "title_canon_sha256": "80938414105274321e6ab0c110fb314d602c4987e0cf28330269640f5ace9ea3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.2875",
    "kind": "arxiv",
    "version": 1
  }
}